Contra Costa County Property Taxes
Effective Tax Rate
0.00%
70.7% above state avgMedian Annual Tax
$0
$575/mo escrow
Estimate Your Tax
Annual Tax
$0
Monthly
$0
Eff. Rate
0.83%
At a Glance
Median Home Value
$830,800
State avg $569,022
Tax w/ Mortgage/yr
$7,538
$628/mo escrow
Tax w/o Mortgage/yr
$5,099
$425/mo
State Tax Rate Rank
#55
of 58 counties (1 = lowest)
Homeowner context
What this means for a Contra Costa County homeowner
Use these county medians as a planning baseline. Your actual bill depends on assessed value, exemptions, millage, and local taxing districts.
Tax pressure
0.83%
0.12 percentage points above the state average
Typical bill
$6,903
$2,858 above the state median
State position
#55
Ranked from lowest to highest effective rate across 58 California counties.
Data Story
About Property Taxes in Contra Costa County, California
Contra Costa taxes rank among nation's highest
Contra Costa County's effective tax rate of 0.831% is more than three times the national median of 0.25%, placing it in the 90th percentile nationwide. The East Bay region shoulders some of America's heaviest property tax burdens.
Highest rate among all profiled counties
Contra Costa's 0.831% rate is the highest in this group and among the upper tier statewide, exceeding California's average of 0.714% by 16%. With median taxes of $6,903, residents pay 71% more than the state median of $4,045.
Outpaced only by Alameda in region
Contra Costa's 0.831% rate exceeds Alameda (0.762%), making it the highest-taxed county in the Bay Area. Both counties reflect expensive real estate values and extensive local services.
Median home costs $6,903 yearly tax
A typical Contra Costa County property valued at $830,800 generates approximately $6,903 in annual property taxes. With mortgage considerations, total liability climbs to $7,538, among the highest burdens in California.
High-value homes often face overassessment
Contra Costa County homeowners with high-value properties should carefully review their assessments—overvaluation is common in expensive markets. Filing an appeal could save thousands annually and is worth the modest effort.
How Contra Costa County Compares
Median Annual Property Tax
Contra Costa County
0.83%
Effective rate
California Avg
0.71%
Effective rate
National Avg
0.91%
Effective rate
Frequently Asked Questions
What is the property tax rate in Contra Costa County, California?
How much are property taxes in Contra Costa County?
How does Contra Costa County compare to the California average?
What is the median home value in Contra Costa County, California?
Why is Contra Costa County property tax rate higher than the California average?
How does Contra Costa County rank for property taxes in California?
Counties with Similar Tax Rates
Nearby Counties
Other Counties in California
Data updated: March 2026
Data from U.S. Census Bureau, American Community Survey 2019-2023 5-Year Estimates. Effective tax rate is calculated as median property tax divided by median home value.
Estimates are informational only and are not tax, legal, financial, or assessment appeal advice. Verify parcel-specific amounts with the county assessor or tax collector.